Boring-machine



(No Model.) 2 Sheets-Sheet 1 J. P. BURNHAM.

BORING MACHINE.

No. 854,179. Patented Dec. 14, 1886..

N, PETERS. Phol0-Lvlh0gmphcn Washington, D. c,

2 .SheetsSheet 2.

(No Model.)

J. P. BUR NHAM.

BORING MACHINE.

No. 354,179. Patented Dec. 14, 1886.

N. PETERS, Pnom-Llmn n lwr. Washmgmn, D. 1:.

JOHN P. BURNHAM, OF CHICAGO, lLLiNOIS.

BORING-MACHINE.

SPIZS'IFICATEON forming part of Letters Patent No. 354,179, dated December 14, 1886.

Application filed April 10, 1856. Serial No. 193,435. (No model.)

To all whom it may concern:

Be it known that 1, JOHN P. BUnNHiM, of Chicago, in the county of (Jock and State of may be varied as desired, and also a stop device, whereby the series of holes in a board may be made to bear a definite relation to the Illinois, have invented certain new and useful end of the board tirstinserted into the machine, 5 5 Improvements in BoringMachines; and I do as will hereinafter fully appear.

hereby declare that the following is a full, My invention may bc more readily underclear, and exact description thereof, reference stood by reference to the accompanying dra\v being had to the accompanying drawings, and ings, in whichto the letters of reference marked thereon, Figure 1 is a plan viewol' a boring'machinc 10 which form a part of this specification. embodying my invention. Fig. 2 is an end The object of this invention is to provide a view thereof. Fig. 3 is a detail vertical seemeans for boring a series of equidistant holes tion of the same, taken upon line .r x of Fig. 1. in strips of lumber, such, for instance, as may Fig. 4 is a central transverse section of the be required in hard lumber for the convenient machine, taken upon line y y of Fig. 1. Fig.

insertion of nails or screws'.- The particular machine herein shown is more especially adapted for boring inclined nail-holes in hard wood tongued and grooved flooring-strips, in

5 is an exterior elevation of the rear side of the machine. Fig. 6 is a detail sectional view taken upon line a x of Fig. 4., illustrating a friction device for checking the rotary movewhich, on accountof the hardnessof the wood, ment of the fecdwhcel. Fig. 7 is an enlarged 7O 2. it is difficult to drive nails in the usual mandetail section of a tongued and grooved floorner, the said machine being adapted to bore ing board or strip, illustrating the aperture inclined or oblique holes from a point in the formed therein by the operation of the machine side edge of the board adjacent to and above shown. Fig. 8 is a perspective view of the the tongue toward the bottom surface of the same. 2 board or strip and at the distance apart at As illustrated in the said drawings, A indiwhich fioor ioists are usually placed, so that cates the main frame of the machine, consistthe flooring boards or strips thus prepared ing of suitable longitudinal, vertical, and may be rapidly and easily secured by nails. transverse pieces constructed to sustain the 'Themain features of thcmaehineherein shown several operative parts of the machine, and 30 may, however, be applied for boring holes at desirably provided with a horizontal top or desired distances apart in wooden strips of table, A. other kinds, and in cases where the holes are B is a shaft or arbor carrying a boring-tool, bored otherwise than obliquely. b, and provided with a belt-pulley, B, and

The machine herein shown as embodying mounted in bearings c, fixed upon a sliding 8 5 one practical form of my invention consists, in or reciprocating plate, 0, having bearings 0 its essential features, of a rotating boring-tool upon a bracket or standard, 0 fixed to the having a reciprocatory movement toward and top of the said frame A. The plate 0 is con from the strips to be bored, an intermittentlystrueted to slide in a direction parallel with acting rollerfeeding device, which is actuated the central axis of the arbor B, to enable the 0 c by suitable devices to give an intermittent boring-tool to be moved in the direction of its forward feed-motion to the board or strip be axis toward and from the Work, the said aring operatedupon, and suitable driving mechher and the supporting-plate being herein anism for the feeding device and the boringshown as inclined at an angle of forty-five detool, so connected that the boring-tool will be grees, to enable an inclined hole to be bored advanced and retracted in the intervals between the intermittent advance movements of the board or strip. Said machine also includes adj nsting devices for Varying or changing the distance through which the board or strip is advanced at each forward movement thereof, whereby the spaces between the holes in a board or strip placed upon the table A.

The means herein shown for giving a reciprocatory movement to the plate 0 consists of an eccentric, D, mounted on a shaft, D, and connected by means of an eccentric-rod, D with a bell-crank lever, D, having operative connection with the said plate 0 through the medium of a connecting-bar, D". In the particular construction of these parts herein illustrated the bell-crank lever D is pivoted upon an arm, fixed'to the bracket and the connecting rod or bar D is provided with an angular bend to avoid interference with the upper bearing, a, of the boring-tool arbor, and is pivoted to the plate 0 near the upper end of the latter.

In the machine illustrated in the drawings motion is given to the boring-tool arbor by means of a belt, E, trained over the pulley B upon the arbor, and over a belt pulley, E, fixed to a shaft, E arranged parallel with the inclined arbor B, said'shaft E being actuated from a suitably-located driving-shaft, F, upon the'machine, as hereinafter described. Provision is made for the longitudinally-reciprocating movement of the arbor B by making the pulley B upon said arbor of greater width than the extent of movement of the boringtool, so that the driving-belt may move or slide endwise upon the said pulley as the arbor is reciprocated, in a well-known manner.

It will of course be understood that as. far as the general operation of the machine is concerned other well-known forms of drivingconnection adapted to allow the free longitudinal movement of the arbor B, while at the same time giving a desired rotary motion thereto, may be employed. The device shown, however, affords a simple and desirable device for the purpose, and one which will preferably be used in practice. 7

In the particular construction of the parts illustrated the shaft E is mounted in bearings e, sustained upon the machine-frame at the end of the latter opposite that at which the shaft D, before referred to, is located, and said shaft E is provided with a second belt-pulley, E whereby the said shaft is actuated by means of a belt, F, passing over a pulley, F fixed upon the driving-shaft F, which latter is mounted upon the machine-frame over and parallel with the shaft D, the said shaft F being provided with a belt-pulley, F over which passes a belt through which motion is transmitted to the machine. Said shaft F is provided, also, with a gearwheel, F intermeshing with a gearwheel, D upon the shaft D, whereby the said shaft last mentioned is actuated from the shaft F. The shafts D and F are shown in the drawings as mounted in standards F bolted to the top of the frameA of the machine, one at each side of the said frame.

It will of course be imderstood that the driving-connections herein illustrated are shown as one convenient form thereof, and that other suitable driving-connections, mounted upon the machineframe or otherwise arranged, may be used in carrying out the invention, as found convenient or desirable.

The feed device for advancing the strip or board being operated upon to the boring-tool is made as follows: G is a feed-wheel mounted upon a horizontal shaft, G, located below the table A of the machine, and provided with peripheral points or spurs g,'adapted to engage the board or strip, which latter is usually placed with its unfinished surface downward, so that the planed or dressed suface will not be marred by the said points or spurs.

Mounted in suitable bearings, H, over the tabletop A,is a horizontal shaft, H provided upon one end with a bearing or guide roller, H, arranged over and in opposition to the feedwheel G, so as to hold the strip or board being operated upon in engagement with the said feed-wheel and to retain said board or strip in proper position with relation to the boringtool.

In order to provide for differences in thicl ness of the strips or boards operated upon by the machine. the bearings 11 are preferably provided with vertically movable bearingboxes h for the shaft 11*, said bearing-boxes being held in position vertically by means of s .t-screws h 12, inserted through the horizontal parts H of the bearings and abutting against the upper and lower surfaces of the said boxes h. By this means the said boxes may be adjusted vertically to bring the bearing-roller H in proper position relatively tothe boring-tool and the feed-wheel G, and also for adjusting the ends of the shaft with relation to each other.

The feed-wheel G is intended to remain practically in the same vertical position in operating upon all kinds of lumber; butin order to allow-said feed-Wheel to yield downwardly,

to prevent undue strain upon the parts when the teeth or spurs g encounter knots in the ICO lumber, or under other circumstances, the

shaft G of the said feed-wheel is mounted in bearings G which are provided with vertically-movable bearing-boxes g, which rest upon compressible layers, cushions, or springs g, of rubber or other suitable material. Sctscrews 9 are desirably provided in the bearingsG, for pressing downwardly upon the bearing-boxes g for the purpose of adjusting the feed-wheel to the work. By adjusting the presserroller H and the feed-wheel G in the manner described the board'or strip being operated upon may obviously be brought accurately into a desired position with relation to the boring-tool.

In a machine of the particular form shown, in which the boring-tool operates obliquely upon the strip or board, means for holding the bearing-roller, I, which is mounted upon aver- .tical axis in position to engage the edge of the strip or board at a point opposite the boringtool. Said roller I is preferably mounted upon a bearing-pin, which is adjustably supported in the machine-frame, wherebysaid roller may be moved toward and from the tool, as may be required in operating upon strips of different widths and for accurately adjusting the position of the strip with relation to the tool.

For these purposes the roller I (shown in the drawings) is mounted upon a pin or stud, i, fixed in a horizontally-sliding bar, I, which is adjnstably held upon the table-top A by means of a screw-bolt, i, inserted through a longitudinal slot, f, inthe bar I, Fig. 4, and entering the said top A.

By adj usting theposition of the presser roller Hand guide-roller I the edge of the board or strip to be operated upon may obviously be accurately located with relation to the boringtool. To permit thelocation of the said roller I and the parts supporting it beneath the shaft H, t he bearings Hof said shaft are desirably sustained above the top A by means of standards 7L2, herein shown as cast integral with the bearings, so as to afford space beneath the said bearings for the said roller I, as clearly shown in Figs. 3 and 4.

The means shown for giving an intermittent rotative movement to the feed-wheel G- consist of a ratchet-wheel, J, fixed upon the feedwheel shaft G, an oscillating arm, J, mounted to swing freely about the axis of the said shaft, and provided with a spring pawl, j, engaging the teeth of the ratchet-wheel, and a crank, K, afiixed to the shaft D, and provided with a crankpin, 7;, which latter is connected by a pitman, K, with the oscillating arm J, whereby in the rotary movement of the said crank and pin the arm J will be oscillated through an arc depending upon the throw of the crank, with the obvious efi'ect of giving a forward rotative movement to the ratchet-wheel J and the feedwheel G at each movement of the oscillating arm in a direction to cause the engagement of the pawl with the ratchet-teeth of the wheel. The crank-pin it, instead of be ing fixed in the crank-arm, is preferably adjustably secured in a slot, 7:, in said arm, so that the throw of the crank and the extent of the oscillatory movement of the arm J may be varied as desired, to give a greater or less rotative movement to the feed-wheel, and thereby vary the distance through which the work is advanced at each forward movement thereof, as desired.

By adjusting the feed-wheel in the manner described the distance apart of the holes bored in the strip may be changed as desiredas, for instance, in boring flooring boards orstrips the holes will be bored at a distance apartequal to the distance apart of the fioorjo sts, Whatever this distance may be in any particular case.

A stationary guide, I is shown as secured in position for guiding the boards or strips to the feed-wheel, said guide being held in place by bolts inserted through slots in the guide and entering the top A in a familiar manner.

In order to check the momentum of the feedwheel and connected parts at the end of each forward rotative movement thereof, so as to prevent the board or strip being carried past the point at which the hole should be bored, I preferably apply to one of the moving parts a V of the said wheel.

friction device, tending to retard the movement In the particular construe tion illustrated said friction device consists of two blocks, L L, provided with concave bearingsurfaces fitted to the shaft G, and held in contact therewith by springs. As a simple and convenient way of arranging these parts, the blocks L L areheld by sliding engagement with two bolts, L L", which are secured at their lower ends in a block, L", bolted to one of the frame-pieces A of the machine, springs Z Z and Z l being interposed between the bolt heads and the upper bearing-block, L, and beacter above described it is desirable that the first hole or aperture formed in such flooringboard should be located at a definite distance from the end of the board which is first intro duced into the machine, so that in securing the boards in place upon a floor or elsewhere one end of each board may be suitably located with reference to one of the side walls of the room without loss in cutting the boards. For this purpose I have herein shown a stop device adapted to engage the end of the board in such manner as to prevent the advance of the latter toward and its engagement with the feed-wheel until the latter has reached a certain point in its forward movement, so that the-first hole will be bored in every instance .when the board has been carried through the same distance by the feed-wheel. The said stop device, as illustrated in the accompany ing drawings, comprises an oscillating arm, M, mounted upon a transverselyarranged rock-shaft, M, and having an upwardly-projecting part or stop, m, extending into the path of the board or strip, and in position to en counter the end of the latter.

In the particular construction illustrated the rock-shaft M is located below the top A of the machine, and the arm M is located at one side of the feed-wheel G, so that the projection m may extend upwardly through the table at a point adjacent to the boi'ingtool. The rockshat't M is normally held in position with the arm M elevated by means of aspring, M snitably applied for the purpose, said spring, as herein shown, being of spiral form and placed around the said rock shaft, as clearly shown in Fig. 1 of the drawings. Upon the end of the said rock-shaft M, which extends beyond the machine-frame at the side of the latter adjacent to the ratchet wheel J, is secured an up wardly-extending arm, M", and said arm M is connected with an arm, J fixed to the hub J of the oscillating arm J" by i'neans of the counecting-rod M, which is pivoted to the arm J, passes through an aperture or slot, at, in the arm M, and is provided upon its end portion with a nut or nuts, m adapted to engage the said arm 1W at .a desired point in the forward movement of the arm J, by which the ratchet-' wheel J is actuated, so as to give a rotative motion to the shaft M, and thereby depress the arm M and permit the passage of a strip or board over the stop m, the said rod M being adapted to slide freely through the aperture m in the arm M so that said arm M and the rock-shaft are only moved during thcpart ofthe stroke of thcarm J in which the nut m engages the said arm M. By adj ustingthe position of the nut m upon the rod M the point in the advance movementpf the feed-wheel at which the arm M and the rock-shaft will be moved may be changed, as desired, so that by such adjustment of the nut the distance from the ,end of the strip or board at which'the first by the action of the spring M when there is no board in the machine, except when de pressed by the action of thedevices described, so that when an attendant attempts to feed a board into the machine the board will encounter the said stop, and will be prevented from engaging the feed-wheel until the stop is depressed, when the board will be allowed to advance and come into engagement with the feed-wheel. After a board or strip hasbeen started through the machine, the stop will be prevented by contact with the under surface of the board or strip from again rising until the rear end of the board has passed over said stop.

It is entirely obvious that a movable stop, operating in the manner described, may be actuated by or from the feed device otherwise than in the particular manner herein shown, and said stop is therefore herein claimed without restriction to its use in connection with the particular devices for operatingit shown in the drawings and above described.

In Fig. 7 is shown in sectional view, and in Fig. 8 in perspective, a flooring board or strip provided with oblique holes forthe insertion of nails, such as is made by theniachine above described.

I am aware that in mortising-machines, such as are used for mortising blind-stiles, a longitudinally-reciprocating boring-tool has been used for cutting mortises in connection with feed devices for intermittingly advancing the work to the boring'tool, consisting of a movable clamp for holding the work,provided with a series of notches or teeth, and a reciprocating pawl operating by its engagement with. the notches to feed forward the clamp and the work held therein.

In the operation of a machine thus con structed, it is obviously necessary, after the completion of each piece, to open the workholding' clamp for the purpose of removing the finished work therefrom, to then thrust the said clamp backwardly preparatory to another advance movement thereof, and to then insert and secure a new piece in the clamp.

Thedevice herein shown differs from-that I above referred to in havinga rotating feed wheel or roller. constructed to directly engage the strips to be bored, which feed wheel or' roller is intermittingly actuated'by driving devices connected with these by which the boring-tool is rcciprocated, and so arranged as to cause "the advance of the tool into the strip in the intervals between the advance movements of thelatter. the boards or strips may be continually fed to the machine, and will be carried past the boring-tool and operated upon automatically, one after the other,withoutthe use of any handlabor, except that necessary for feeding the strips to the feed-roller.

I claim as my invention- 1. A machine for boring holes in wooden strips, comprising a rotating and longitudinally-reciprocating boringtool, an intermittingly-acting feed-wheel engaging the strip to be bored and operating to carry the latter in a direction transverse to the axis of the boringtool, and means for giving a reciprocatory movement to the boring-tool and for actuating the feed-wheel, constructed to advance the said tool toward the strip at times when the feed-wheel is stationary, substantially as described. g

2. A machine for boring-holes in wooden strips, comprising a revolving arbor carrying a boring-tool, a sliding plate provided with bearings for said arbor, an eccentric, an cecentric-rod, a bell-crank lever'connected with the eccentric-rod and the said plate, an intermittingly-acting feed-wheel, and means for actuating the feed-wheel and for giving rotary motion to the eccentric,'constructed to ad-' Vance the boring-tool during the time that the feed-wheel is stationary, substantially as described. t

3. The combination, with a rotating and longitudinally-reciprocating boring-tool, of an intermittinglymoving feed 'wheel engaging the strip to be bored, a bearing-roller opposed to said feed-wheel and adjustable toward and from the latter, and means for giving a reciprocatory movement to the boring-tool and for actuating the feedwheel, constructed to move the wheel at times when the tool is retracted, substantially as described.

4. The combination, with a rotating and By this construction longitudinally-reciprocating boring-tool, of an intermittingly-moving feed-wheel engaging the strips to be bored and mounted in yielding bearings, a bearing-roller opposed to the said feedavheel, and means for giving a reciprocatory movement to the boring-tool and for actuating the feedavheel, constructed to move the wheel at times when the tool is retracted, substantially as described.

5. The combination, with a rotating and longitudinally-reciprocating boring-tool, and guides for the strip to be bored, sustaining the latter obliquely with reference to the axis of said boring tool, of an intermittingly-moving feed-wheel engaging the strip to be bored, a bearing-roller opposed to said feed-whcel, a lateral guide, as I, located at the side of the path of the strip opposite the said boring-tool for holding the strip from lateral movement under the act-ion of said tool, and means for giving a reciprocatory movement to the boringtool and for actuating the feed-wheel, constructed to move the wheel at times when the tool is retracted, substantially as described.

6. The combination, with a rotating and longitudinally-reciprocating boringtool, and guides for the strip to be operated upon, sustaining said strip obliquely with reference to the central axis of the tool, of an intermittingly-acting feed-roller engaging the said strip, a bearing-roller opposed to said feedwheel, a laterally-adjustable guide-roller, I, engaging the edge of the strip opposite to that operated upon by the boring-tool, and means for giving a reciprocatory movement to the boringtool and for actuating the feed-wheel, constructed to advance the said tool toward the strip during the intervals between the advance movements of the latter, substantially as described.

7. The combination, with a reciprocating boringtool and a feed-wheel, of means for intermittingyaetuating the feed-whee1,comprising a ratchet-wheel connected with the said feedwheel, an oscillating arm adapted to swing about the axis of the ratchet-wheel, a pawl upon the arm engaging the said ratchet wheel, and means connected with the said oscillating arm for actuating the latter, and means actuating the boring-tool, constructed to advance the latter to the strip during the intervals between the movements of the feedwheel. substantially as described.

8. The combination, with a reciprocating boring-tool and a feed-wheel, of a ratchet wheel connected with the feedwheel, an oscillating arm adapted to swing about the axis of the ratchet-wheel, a pawl upon the said arm engaging the ratchet-wheel, and a shaft provided with a crank-arm, and crank-pin connected with the said oscillating arm, said crank-pin being adjustably attached to the arm, whereby the throw of the crank and the movement of the oscillating arm may be varied, and means actuating the boringtool, constructed to advance the latter to the work a during the intervals between the forward 9. The combination, with a reciprocating boring-tool, a feed-wheel, and means for actuating the boring-tool, comprising a shaft, D, and an eccentric, D, of a ratchet-wheel, J, connected with the feed-wheel, an oscillating arm, J, constructed to swing about the axis of the ratchet-wheel, .a pawl upon the said oscillating arm, engaging the ratchet-wheel, a crank arm, K, provided with an adjustable crank-pin, k, and a pitman, K, connecting the said crank-pin and arm J, substantially as described.

10. The combination, with a reciprocating tool-carrying arbor, and a reciprocating plate provided with bearin gs for said arbor, of a shaft, D, an eccentric, D, upon said shaft, a bellcrank lever, D connected with said eccentric and with the plate 0, a feed-wheel, G, mounted upon a shaft, G, a ratchet-wheel, J, fixed to said shaft G, an oscillating arm, J, mounted to swing about the axis of the shaft, a pawl upon the arm J, engaging the ratchet-wheel, and a crank-arm, K, upon theshaft D, pro: vided with an adjustable crank-pin, 7r, connected with said arm J, substantially as described.

11. The combination, with a reciprocating boring-tool, means for actuating the latter, and feed devices giving an intermittent advance movement to the work, of a stop, at, located in advance of the feed devices and movable into and out of the path of the work, and means for moving said stop,controlled by the devices by which the boring-tool is actuated, substantially as described.

12. The combination, with a reciprocating boring-tool and a feed device, of a movable stop, m, operating to prevent the advance of the work to the feeding device, and means actuating the said stop, comprising a rockshaft, M, a spring, i applied to-thr0w the stop in one direction, an arm, M upon the rock-shaft, a rod, Mi having sliding engagement with the arm M and provided with a nut or collar, m said rod M being connected with and actuated by a moving part of the feed device, substantially as described.

13. The combination, with a reciprocating boring-tool and a feeding device, a stop, at, a rock-shaft, M, sustaining said stop, a spring applied to throw said stop and rock-shaft in one direction,an arm, M, upon the rock-shaft, a rod, M", having sliding engagement with the arm D 3 and provided with a nut or collar, m adjustable upon the said rod, said rod M" be ing connected with and actuated by a moving part of the feed device, substantially as de scribed.

14. The combination, with a reciprocating boringtool, and a feeding device embracing a feed-wheel, G, a ratchet-wheel, J, and an oscillating arm, J, provided with a pawl engaging said ratchetwheel and attached to and moving an arm, J of a stop device consisting of astop, m, a rockshaft, l\[, a spring, M an arm, M and a rod, M", attached to said arm J and having sliding engagement with the arm M said rod M being provided with an the wheel for checking the momentum of the IO adjustable collar or nut, m", substantially as latter, substantially as described.

described. In testimony that I claim the foregoing as 15. The combination, with reciprocating my invention I affix my signature in presence boring-tool and a feed device comprising a I of two witnesses.

feed-wheel, and means for giving an intermittent rotary movement to said wheel, of a fric- Witnesses:

tion device located upon the machine-frame C. CLARENCE POOLE,

and bearing upon a rotating part attached to THOS. KLU.

JOHN PQBURNHAM. 

